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Posted: 05/29/08
03:55 PM
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NEED HELP ON THIS I HAVE A 350CI #3970010 AND A CRANK 0F A 400CI #3951528 AND WORLD HEADS S/R TORQUERS ROSS PISTONS NEED TO KNOW IF I CAN USE MY FLYWHEEL THAT CAME OF A 350CI OR WHAT DO I NEED TO PUT TOGETHER RUNNING A 4 SPEED MUNCIE WITH A 2.20 FIRST GEAR IS THAT ANY GOOD?THANKS
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GibTG
Guru
| Posts: 905
| Joined: 08/03
Posted: 05/29/08
04:36 PM
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That crank will not go into a 350 block without some serious machining, as in cutting down the main journals .200".
The 400 crank will also require a externally balanced flywheel and balancer, OE 350 pieces will not work. Internally balancing a GM crank really isn't worth the price either.
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Posted: 05/30/08
06:32 AM
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Yep, you'll need to use the balancer and flywheel for a 400 with the 383 you're putting together.
You'll need to do some cleanrcing in the block for the crank throws, but this isn't hard, guys have been doing it for decades.
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